How to convert Flash Video (FLV) to AAC
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Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
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Convert Flash Video (FLV) to AAC
NexMedia converts Flash Video (FLV) to AAC on its own servers. Processing time depends on the file size and how busy the queue is.
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Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About Flash Video (FLV)
Flash Video (FLV) is the container Adobe Flash Player used to stream video on the web, typically with H.264 or the older Sorenson Spark and VP6 codecs.
Videos saved from websites of the Flash era and from some older streaming and recording tools.
Adobe ended Flash Player at the end of 2020 and browsers removed it, so FLV files need a converter or a desktop player such as VLC.
Convert FLV to AAC online free, no account required — AAC is the lossy audio codec that succeeded MP3.
Change FLV to AAC without losing quality — convert FLV to AAC free in your browser.
Why won't my old FLV videos play anywhere anymore? Flash Player was retired at the end of 2020 and browsers dropped support, so the only practical way to keep them is converting to MP4.
About AAC
AAC (Advanced Audio Coding) is the lossy audio codec standardised in MPEG-2 and MPEG-4 as the successor to MP3; at the same bitrate it generally sounds better than MP3.
It is the audio in most MP4 videos, in Apple Music and on YouTube; a .aac file is a bare AAC stream without a container.
A bare .aac stream has only limited room for tags and cover art, so music players usually expect AAC inside an M4A file.
Why convert music to AAC instead of MP3? At the same bitrate AAC sounds better, and every modern phone, computer and streaming service decodes it.
What changes when you convert FLV to AAC
- The soundtrack of the FLV is re-encoded as AAC at the default settings, so it is close to the original but not bit-identical.
- Only the sound is kept: the AAC file contains the audio track of your FLV, and the picture is dropped.
Settings you can change
Before you convert FLV to AAC, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted AAC file is kept for 2 hours, then deleted.
FLV to AAC: questions and answers
Does converting FLV to AAC reduce quality?
The soundtrack of the FLV is re-encoded as AAC at the default settings, so it is close to the original but not bit-identical.
What is the difference between FLV and AAC?
FLV is the Flash Video format of the Adobe Flash Player era. AAC is the lossy audio codec that succeeded MP3.
Can I change the settings when converting FLV to AAC?
Before you convert FLV to AAC, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Do I need an account to convert FLV to AAC?
No. You can convert FLV to AAC without an account; signing in raises the file-size and daily limits.
How long is my converted AAC file kept?
The AAC file you convert from FLV is kept for 2 hours, then deleted automatically.
When I convert FLV to AAC, can I keep just the sound?
Only the sound is kept: the AAC file contains the audio track of your FLV, and the picture is dropped.
Will converting FLV to AAC change my original file?
No. The conversion reads your FLV and writes a new AAC file, leaving your original FLV file untouched.